Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate
2008-01-22
2010-02-09
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
Using differential pressure
C073S861640
Reexamination Certificate
active
07658117
ABSTRACT:
A method and apparatus for measuring the flow rate of a fluid within tubing disposed within a downhole wellbore. The present invention provides an inverse Venturi meter inserted within tubing with an enlarged inner diameter portion. Pressure differential is measured between the enlarged inner diameter portion and another portion of the inverse Venturi meter. Flow rate is determined from the pressure differential and the density of the fluid.
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Canadian Office Action, Application No. 2,477,659, dated Apr. 3, 2009.
Patel Harshad
Patterson & Sheridan LLP
Weatherford / Lamb, Inc.
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